/// 
/// MaDAson - Toolkit for Model Driven Software Development
/// 
/// Copyright [2006] Marcus Lankenau
/// 
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///  
///     http://www.apache.org/licenses/LICENSE-2.0
///  
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
/// 

using System;
using System.Collections.Generic;
using System.Text;
using NUnit.Framework;
using System.IO;
using System.Threading;


namespace Madason.GenUtils.Tests
{
	/// <summary>
	/// Ensure the SensorWriter does basicaly the same a StreamWriter does, writing something
	/// into a file
	/// </summary>
	[TestFixture]
	public class TestSensorWriter
	{
		const string testFileName = "sonsor_writer_test.txt";

		[SetUp]
		public void Setup()
		{
			if (File.Exists(testFileName))
				File.Delete(testFileName);
		}

		[TearDown]
		public void Teardown()
		{
			if (File.Exists(testFileName))
				File.Delete(testFileName);
		}

		[Test]
		public void TestWriteSomething()
		{			
			using (SensorWriter writer = new SensorWriter(testFileName))
			{
				writer.Write("Test");
			}

			Assert.IsTrue(File.Exists(testFileName), "can't find " + testFileName);

			using (StreamReader reader = new StreamReader(testFileName))
			{
				string content = reader.ReadToEnd();
				Assert.AreEqual("Test", content);
			}
		}

		/// <summary>
		/// Ensure the Writer only writes the file, if the new content is different from
		/// the old content
		/// </summary>
		[Test]
		public void TestWriteSame()
		{
			using (SensorWriter writer = new SensorWriter(testFileName))
			{
				writer.Write("Test");
			}


			DateTime lastWriter = File.GetLastWriteTime(testFileName);

			Thread.Sleep(500);

			using (SensorWriter writer = new SensorWriter(testFileName))
			{
				writer.Write("Test");
			}

			Assert.AreEqual(lastWriter, File.GetLastWriteTime(testFileName));
		}
	
	}
}
